The DIGImend project aims at improving Linux support for generic graphics tablets. We work to provide kernel drivers, kernel and userspace driver fixes, accompanying development, testing and end-user tools, documentation and HOWTOs.Generic graphics tablets include ones designed and sold by Huion, KYE, UC-Logic and Waltop, rebranded and sold by Aiptek, Genius, Monoprice, Princeton, Trust, and many others.
Essentially, any USB-connected tablets not produced by Wacom. For the latter see The Linux Wacom Project.